One example of a catchy title for a science project on forces is : "May the force by with you." A good science project title should be catchy and meaningful. A great way to achieve this is to use common expressions that allude to what the project is about.
Title inspiration can come from any part of the project. If the project compares techniques for measuring force, "Measure by Measure" (the title of a play by William Shakespeare) would be appropriate. If the project concerns measuring the forces applied by springs with weights attached by hooks, the title could be "Hook, line and sinker." If the force in question is gravity, a possibility is "The gravity of the situation."